Çi̇nko Borat Katkili Poli̇propi̇len’i̇n Reoloji̇k Özelli̇kleri̇ni̇n Beli̇rlenmesi̇

Abstract

ÖZETGerçekleştirilen bu çalışmada, toz haldeki polipropilen (PP) malzemeye ağırlıkça % 5; % 7,5; % 11,25; % 16,875 ve % 25,3125 oranlarında çinko borat ilave edilerek takviyelendirilmiş polipropilen granülleri üretilmiştir. Çinko borat katkılı polipropilenin granül üretimi esnasında karışıma, oksitlenmeyi önlemek amacıyla % 0,2 oranında antioksidan olarak maleik anhidrit katılmıştır. Kompozit granül üretildikten sonra ergiyik akış indeksi (EAİ) cihazı kullanılarak takviyelendirilmiş poliproplen'in reolojik özellikleri tespit edilmiştir. Dört farklı yük (298,2 kPa, 524 kPa, 689,5 kPa ve 987,4 kPa) ve dört farklı sıcaklık (190 C, 200 C, 210 C ve 220 C) altında yapılan deneylerde malzemelerin EAİ kayma gerilmesi, kayma hızı ve viskozite değerleri elde edilmiştir. Bu çalışmaya göre, artan çinko borat katkı oranına göre viskozite değerinin arttığı ancak artan sıcaklık ve basınca bağlı olarak viskozitenin azaldığı tespit edilmiştir. Artan sıcaklık ve basınca bağlı olarak EAİ değerinde artış olurken, artan çinko borat katkı oranına göre ise EAİ'de azalma olduğu belirlenmiştir. Ayrıca, kayma hızının artan katkı oranına bağlı olarak azaldığı ancak sıcaklık ve basınç artışı ile birlikte arttığı görülmüştür.Anahtar Kelimeler: Çinko borat takviyeli polipropilen, Reolojik özellikler, Viskozite, Kayma hızı, Ergiyik akış indeksi DETERMINATION OF RHEOLOGICAL PROPERTIES OF ZINC BORATE REINFORCED POLYPROPYLENE ABSTRACTIn this study reinforced polypropylene granules have been produced by the way zinc borate are added to powder polypropylene material at the rate of 5 %, 7.5 %, 11.25 %, 16.875 % and 25.3125 %. To prevent oxidation, at the rate of 0.2 % maleic anhidrit as a antioxidant has been added to PP during the production of zinc borate reinforced polypropylene granule. After composite granule was produced, rheological properties of reinforced polypropylene have been determined by using melt flow index device (MFI ). According to this study, it has been determined that viscosity value increased depending on zinc borate rate but viscosity decreases depending on increasing temperature and pressure. It was determined that MFI values have been increased depending on increasing temperature and pressure whereas MFI values have been decreased according to increasing zinc borate rate. In addition, it has been seen that shear rate decreases depending on increasing proportion of additive but it increases with the increase of temperature and pressure.

Determination of the Rheological Properties of Polypropylene Filled with Colemanite

“…, as colemanite content is increased, shear rate is decreased, but as pressure is increased, shear rate values increase in parallel. These results, which indicate the effects of pressure on deformation rates, are in line with the results of the studies found in literature …”

“…Accordingly, it was determined that the viscosity of colemanite‐filled PP material exhibited an overall increasing trend in response to increasing concentrations of colemanite (despite a small decrease at the 11.25 wt% concentration mix rate), and that viscosity decreased in response to increasing temperature and pressure. The results of this experimental study, in line with existing literature, exhibited increasing viscosity values up to a colemanite concentration mix of approximately 11.25 wt%. It is determined that as increased viscosity will complicate the injection molding process, remaining parameters for the injection process should be increased as well.…”

“…As the colemanite content increased, its viscosity increased as well, which is supported by other studies in the literature . However, when colemanite content increased from 11.25 to 16.875 wt%, viscosity decreased and increased again.…”

“…Kansu investigated the mechanical and physical properties of PP composites loaded with glass microspheres, calcium carbonate, and talc . Another study found that nano‐zinc borate, zinc borate had inflaming retarding effects on PP. Fire‐resistance and viscosity versus shear rate for ethylene‐vinyl acetate filled with Mg(OH) 2 , zinc borate, and talc was investigated, and the study discovered that as shear rate increased, viscosity decreased.…”

Investigation of rheological and mechanical properties of wood flour reinforced polypropylene

“…In experiments conducted with melt flow index test device, viscosity values were obtained from shear stress and corrected shear rate via Rabinowitsch equation. According to the results of the corrected shear rate and shear stress; corrected viscosity values Equation 5 were obtained from corrected shear rate section of corrected shear stress [25,26].…”